Osteology of Speotyto Cunicularia Var. Hypogaea (Classic Reprint)

February 11, 2019|
Osteology of Speotyto Cunicularia Var. Hypogaea (Classic Reprint) by Robert Wilson Shufeldt
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Excerpt from Osteology of Speotyto Cunicularia Var. Hypogaea

Clubbed at their superior extremities, each one overlaps the rib behind it, and in this manner add stability to the thoracic parietes, which is undoubtedly the function these little scale-like bones were intended to fulfil. The hwmpapohyses connect the vertebral ribs with the ster num. There are six of them, one articulating with each vertebral rib and having a concave facet to receive it, while the last meets the sacral rib above and articulates with the posterior border of the fifth below. The first one is the shortest and most slender of all; the fifth is the longest. With the exception of the last, theirsuperior ends are enlarged and compressedfrom side to side, while below their middles they be come smaller; then turning upon themselves, suddenly enlarge again, so as to be flattened from before backwards, when each terminates by a transverse articular facet for articulation with the haemal spine. Quite an interspace exists between their points of contact with the sternum. They all make a gentle curve upwards just before meeting their respect ive ribs. The haemapophysis that articulates with the sacral rib is in serted in a long, shallow groove on the posterior border of the sternal rib that articulates with the last dorsal pleurapophysis, but does not meet the sternum - simply terminating in a fine point on the posterior border of the sternal rib mentioned. From before backwards the ster nal ribs make a gradually decreasin g obtuse angle with the vertebral ribs, while the angle they make with the sternum is a gradually increas ing acute from the fifth to the first. Ou the anterior surfaces of their expanded sternal ends are to be found on each a minute pneumatic fora men or two. The anterior third of the lateral borders of the sternum is the space allotted for the insertion of these bones.

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Title:Osteology of Speotyto Cunicularia Var. Hypogaea (Classic Reprint)
Product dimensions:40 pages, 9 X 6 X 0.08 in
Shipping dimensions:40 pages, 9 X 6 X 0.08 in
Published:February 11, 2019
Appropriate for ages:All ages
ISBN - 13:9780260125989

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